Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a soma dos asts para o Boston College com um rebs acima de 63?
 ###Tabelas: CREATE TABLE e (e_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Pos. VARCHAR, From INT, School/Country VARCHAR, Rebs INT, Asts INT) CREATE TABLE home_attendance (home_attendance_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Round VARCHAR, Attendance INT, Opposition VARCHAR, Stadium VARCHAR) CREATE TABLE 1940s (1940s_id AUTO_INCREMENT PRIMARY KEY, Debut year INT, Player VARCHAR, Date of birth VARCHAR, Games INT, Goals INT, Years at club VARCHAR) CREATE TABLE characters (characters_id AUTO_INCREMENT PRIMARY KEY, Gatchaman VARCHAR, Battle of the Planets VARCHAR, G-Force VARCHAR, Eagle Riders VARCHAR, OVA (Harmony Gold Dub) VARCHAR, Rank VARCHAR, Bird Uniform VARCHAR, Weapon VARCHAR, Mecha VARCHAR, Japanese voice actor VARCHAR, Voice actor (BOTP) VARCHAR, Voice actor (G-Force) VARCHAR, Voice actor (Harmony Gold OVA Dub) VARCHAR, Voice actor (Eagle Riders) VARCHAR, Voice actor (ADV TV/Sentai OVA dub) VARCHAR) CREATE TABLE official_competitions (official_competitions_id AUTO_INCREMENT PRIMARY KEY, Competition VARCHAR, Stage VARCHAR, Venue VARCHAR, Date VARCHAR, Result VARCHAR)  
SELECT SUM Asts FROM e WHERE School/Country = boston college AND Rebs > 63